i recently converted my 2004 vitz on CNG.. its giving me 120 w/ AC on in local running including idle running with ac on on signals and stopovers ... i've yet to get my final cng settings done from the mechanic... its initial milage that i'm posting after 2-3 cylinder refills ...
i had to get it converted on cng even though i was never up for it .. but the recent petrol prices and the milage it was giving me on petrol made me opt for cng..